The Utah Highway Patrol is looking for a gunman who randomly fired at multiple vehicles early Tuesday morning on Interstate 15, striking at least four cars and wounding two people.

Witnesses reported that as a light colored SUV — “possibly something like a Jeep Cherokee” — sped past other vehicles, a man inside fired a gun at them, according to UHP. The shootings were first reported about 3:15 a.m., and all took place on a 37-mile stretch of I-15 between Nephi in Juab County and Scipio in Millard County.

Three of the vehicles that were hit were traveling south, and one was traveling north. Two people in separate cars — a man and a woman — were injured. Their injuries are not life-threatening, UHP said.

On Wednesday, UHP reported that a fifth vehicle — a box truck — was hit. The driver was not injured.

“The last report was that the suspect was southbound on I-15, but the last reported vehicle that was shot was northbound,” according to a UHP news release. “The current whereabouts of the shooter are unknown at this time.”

UHP urged drivers to be alert while driving on I-15 between Nephi and Scipio and to call 801-887-3800 to report any suspicious activity.